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from django.test import TestCase
from django.utils.deprecation import RemovedInDjango30Warning
from .models import Cash, CashModelDeprecated
class FromDBValueDeprecationTests(TestCase):
def test_deprecation(self):
msg = (
'Remove the context parameter from CashFieldDeprecated.from_db_value(). '
'Support for it will be removed in Django 3.0.'
)
CashModelDeprecated.objects.create(cash='12.50')
with self.assertWarnsMessage(RemovedInDjango30Warning, msg):
instance = CashModelDeprecated.objects.get()
self.assertIsInstance(instance.cash, Cash)
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